Webra TruTurn Adapter Bushing Problem

[Alan Simmonds]

Just a thought... if the crank was oversize it would not fit the front
bearing.
 
Alan Simmonds
 
 -----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]
On Behalf Of Lee Davis
Sent: 08 January 2003 19:10
To: discussion at nsrca.org
Subject: Re: Webra TruTurn Adapter Bushing Problem



This is a new one I haven't heard of before.  If you don't have any luck
you can always return the engine to us and we'll check it out.  Look
hard at the bushings, though.  It's difficult to imagine that out of all
the Webra engines there's one that's oversized at the crank end.
Anything's possible though.
 
One likely solution just occured to me.  Try heating the bushing in the
oven or with a small torch.  The aluminum will expand quite a bit and
I'll bet it will then slip over the crank.  It's probably not off more
than a couple of thousandths.
 
Lee Davis
Piedmont Models
HYPERLINK "http://www.piedmontmodels.com/"http://www.piedmontmodels.com/

----- Original Message ----- 
From: HYPERLINK "mailto:tkeithb at attbi.com"Keith Black 
To: HYPERLINK "mailto:discussion at nsrca.org"discussion at nsrca.org 
Sent: Wednesday, January 08, 2003 12:56 AM
Subject: Help: Webra TruTurn Adapter Bushing Problem

I have a new Webra 1.45 Aero X and I'm trying to mount a 3 1/4" TruTurn
FAI spinner on it. The adapter kit that is listed for this engine on
both TruTurn's and Piedmont's web page is TT-0825-A which contains an
8mm bushing. 
 
The bushing fits over the threaded part of the crankshaft, but will not
fit over the unthreaded base of the crankshaft. 
 
I tried another 8mm bushing that I have to make sure that the bushing
with the adapter kit wasn't incorrect and neither bushing will fit. 
 
Using a caliper the base of the crankshaft measures about 8.1 to 8.2 mm.
 
Has anyone else had this problem? Any suggested solutions?
 
Thanks,
Keith Black
 


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